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Thamnophis mendax 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Squamata Natricidae

Scientific Name: Thamnophis mendax Walker, 1955

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Mendoza-Quijano, F.
Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Justification:
Listed as Endangered because its extent of occurrence is less than 5,000 kmĀ², all individuals are in fewer than five locations, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat.

Geographic Range [top]

Range Description:This species is endemic to the Sierra Madre Oriental in eastern Mexico, where it is restricted to Racho Cielo and Sierra de San Carlos in southwestern Tamaulipas. These sites may be isolated as there are lowlands between them. It is found from 1,100 to 1,600 m asl.
Countries occurrence:
Native:
Mexico
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is a rare species.
Current Population Trend:Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits primary humid pine-oak forest and cloud forest. It is not present in secondary or disturbed habitats. Animals can be found under rocks, logs, under agave leaves and other ground cover. It is a viviparous species.
Systems:Terrestrial

Threats [top]

Major Threat(s): It is threatened by habitat loss and fragmentation through conversion of land to agricultural use, principally cattle ranching. It does not move between habitat fragments.

Conservation Actions [top]

Conservation Actions: It is present in the Rancho Cielo Biosphere Reserve. Further studies are needed into the distribution, ecology, natural history and biology of this species.

Citation: Mendoza-Quijano, F. 2007. Thamnophis mendax. The IUCN Red List of Threatened Species 2007: e.T63983A12725943. . Downloaded on 23 November 2017.
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